70685999 has 2 divisors, whose sum is σ = 70686000. Its totient is φ = 70685998.

The previous prime is 70685981. The next prime is 70686029. The reversal of 70685999 is 99958607.

It is a weak prime.

It is a cyclic number.

It is a de Polignac number, because none of the positive numbers 2^k-70685999 is a prime.

It is a Chen prime.

It is a self number, because there is not a number n which added to its sum of digits gives 70685999.

It is a congruent number.

It is not a weakly prime, because it can be changed into another prime (70685929) by changing a digit.

It is a polite number, since it can be written as a sum of consecutive naturals, namely, 35342999 + 35343000.

It is an arithmetic number, because the mean of its divisors is an integer number (35343000).

Almost surely, 2^70685999 is an apocalyptic number.

70685999 is a deficient number, since it is larger than the sum of its proper divisors (1).

70685999 is an equidigital number, since it uses as much as digits as its factorization.

70685999 is an evil number, because the sum of its binary digits is even.

The product of its (nonzero) digits is 1224720, while the sum is 53.

The square root of 70685999 is about 8407.4965953011. The cubic root of 70685999 is about 413.4704404816.

The spelling of 70685999 in words is "seventy million, six hundred eighty-five thousand, nine hundred ninety-nine".